Greenlee Hydraulic Punch Set, 1/2 in - 4 in. | Aztec Rental Services
GREENLEE hydraulic knockout punch set, 4 1/2", 4", 2 1/2" hole. For parts only – ASA College: Florida
Tempo Greenlee 7310SB Ram and Hand Pump Hydraulic Driver Kit with 10 Slug Buster Punches - 1/2" to 4" Conduit : Amazon.ca: Tools & Home Improvement
154 1/2" - 4" Standard Hydraulic Knockout Set - Current Tools
Greenlee Slug-Buster 7238SB Manual Knockout Punch Die Kit, 10 ga Capacity, For Use With Battery Powered/Hydraulic Ratchet Driver and 3/8 in and 3/4 in Draw Stud, 1/2 to 2 in Conduit/Pipe, Mild Steel